1)   Screen Calipers 4.0 The Screen Calipers are the unique on-screen measurement tool, that let you measure anything on your computer screen with ultimate accuracy. The Screen Calipers floats above any other application so you can measure anything on your screen. 2)   Cardio Calipers 3.3 The Cardio Calipers provide a fast and accurate way to measure electrocardiograms on a computer screen with pixel perfect accuracy. The Cardio Calipers are the perfect solution for EKG measurement, to measure Heart Rate, and any part of the complex. 3)   Screen Calipers Mac Edition 3.2 The Screen Calipers are the unique on-screen measurement tool, that let you measure anything on your computer screen with ultimate accuracy. The Screen Calipers floats above any other application so you can measure anything on your screen.